Apparatus for erecting concrete piles.



N. C. JOHNSON.

APPARATUS FOR ERECTING CONCRETE PILES.

APPLICATION FILED IULY I0' I9I4. RENEWED AUG. 5I, IQI".

Patented .IL-1y .2, 191( nl Z ing on such piles.

.NATHAN C. JOHNSON, Ol? ENGLEWOOD. NEW JERSEY, ASSIGNR TO RAYMOND CON- CRETE PILE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

APPARATUS FOR ERECTNG CONCRETE PILES.

Specification of Letters Patent.

Patented May 2, lltfllltl.

Application filed .Tuly 1G, 1914, Serial No. 85005. Renewed August 5, 1915. Serial No. 43,902.

To all whom t may concern:

Be it known that l, NATHAN C. Jonsson', a citizen of the llnited States, residing at Englewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Apparatus for Erecting Concrete Piles, of which the following, is a full, clear, and exact description.

ln erecting concrete piles molded in placethat is, in which a hole is first driven into the ground and the plastic material then filled in-it is very desirable that the integrity of the resulting; pile or column be maintained as by leaving in the ground a thin metal or other shell which shall resist the inward pressure of the surrounding,r earth until the plastic material is firmly set. One form of such shell is shownin U. S. patent to Raymond No. 589,026, dated August 3l, 1897. ln some cases it has been found desirable to have a pedestal or enlarged foot Usually this has been accomplished by making the pile shell open at the lower end and withdrawing it gradually as the plastic materal is filled in. This, however, has been open to the serious objection that water or other foreign matter seeping in as the pile shell is removed tends to affect the integrity or stability of the column or pile, and consequently to impair or defeat its utility. y

` By my present invention l can erect mold-- in-place piles with an enlarged footing or pedestal, at the same time avoiding these and other objections.

ln the drawings, Figure l represents in longitudinal section a pile shell in place in the earth showing my apparatus partly in section and partly in elevation; Fig. 2 is a similar View after the pedestal or enlarged footing is substantially formed. Fig. 3 is a cross section on the line A-A of Fig. 1, and Fig. 4 is a cross section on the line B-B of Fig. 2'.

In the drawings 1 represents a pile shell which may he of thin sheet metal, papiermch or the like, which is driven into the groiind in a manner well understood in the art.

. 2 is a container or cartridge which, after the pile shell has been driven into place,`

is filled with plastic concrete and let or dropped down into the pile shell as hereinafter described. Attached to the lower end of the cartridge Q is a head 3, to which are hinged knives 4.-, the arrangement being such that when pressure is applied, the knives will be forced outwardly to the posi tion shown in Fig. and when thecartridge i2 is drawn upward the knives will swing back into the cavity of the pile shell. llt the bottom the. knives rest on va head G having inclined upper surfaces, as shown, and supported within said head 3, by a slidiner rod 5, so as to have vertical movement within the cartridge head. The head il provided with 'grooves to permit 'its withdrawal through the plastic vcementitious material. v

ln the use of my device the cartridge andv head are Imade sufficiently smaller than the main diameter of the, pile shell, so that they may beleasily inserted into and removed therefrom. Having been filled with plastic concrete'and inserted into the pile shell, thel device is droppedto the bottom thereof from a height of say 5 or 6 feet, when the weight and impact of the plastic concrete will throw the knives 4l outwardly, so that. thety will cut or burst through the thin pile shell and permit the plastic concrete to h'ow outlwardly so as to form a footing; or pedestal=in the manner indicated in Figs. 2 and. 4, and at the same time seal off the holes in the pile shell against seepage. rlhis action may, if desired, be increased by pressure applied on the top of the concrete as oy-a tamper or other suitable means. lt will be observed 'from Fig. 2,'the. cutting of the. pile shell only extends upward. for a short. distance, leaving the main part of the pile shell intact and so preserving,` the integrity of the column. At the lower part there is no opportunity for water or mud to seep into the pile shell,..for the force of the in pact on dropping the :artridne and the pressure exerted by the pile driver or other means will force the plastic concrete outward and thereby minimize and obviate to every practical extent the seepage of water into the column. lnnuediately after the pedestal has been formed, as described, the cartridge Q, with its attached head and knives, may be withdrawn from the pile shell and the act of. pullingr it upward will end to swing the knives 4f inward. Tin: balance, of the piley or column may then he filled in the ordinary manner if the contents of the cartridge have been. insulicient for los l that purpose. Preferably Ifasten the i knives 4 with a light Wire or cord? before drpppingthis fastening being of such character as will be: broken by 'the\impact, to

What I claim` as my invention is: 1.111 anapparatus for forming pedestal piles, the combination'wi'th a pile shell, of a y container for a charge of plastic concrete, ic

ahead upon the container, cutting devices hinged at the'lower end of said container c and adapted tobe actuated by the said head and means for withdralvingsaid container from the pile shell. i

2. In an apparatus for forming -piles within a pile shell, the combination of a container for plastic concrete of less diame- 'ter than the pile shell, a head upon the container, a series of cutting devices arranged to be swungoutwardly by the impact ofthe 'said head upon the container against the lower end of the pile shellpand means for withdrawing the contai-er from' the .pile' -f-shell.

3, An apparatusl for molding piles with enlarged footing, comprising a pile shell of .thin material driven into the ground, a container for plastic'material 'adapted to move freely Withinthe pile shell and means operated bythe impact of said container against the bottom of the pile shell for cutting the i footof the latter so as to permit a part of the contents of the container' to be discharged through the lower end of the pile shell. w

t. apparatus for forming piles, comprising, in combination, a pile shell driven permit the khives to performtheir function.

into the. ground, a container for plastic material adapted to move freely within the pile shell, a head secured in the lower end of the container adapted to move toward and =away therefrom, a series of cutting devices 'contents ofthe container to be discharged through thelowver end of the pile shell.

5. An apparatus for forming piles, comprising, in combination, a pile shell driven y into the ground, a container for plastic materialfadapted to move freely within the pile shell, a head secured in the lower end of the container adapted ,to move toward and away therefrom, grooves in the said head, a series of cutting devices having one end pivotally secured upon the low-erelid of the container and the other end `in register with the Said head member adapted to be forced outwal'dlyuvlie'n `the"lad member strikes *the bottom of the pile shell thereby cutting the foot of the. latter so as to permit a part of the contents fof the container to be discharged through' the lower end of the pile shell. In testimony whereof l ai'xiny signature 1n the presence of two suhscrlbmg witnesses.

NATHAN C. JOHNSON.

Witnesses THOMAS J. BYRNE, J oHN B. MCGUIRE. 

